2N149 NPN Transistor

The 2N149 is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the 2N149 transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The 2N149 transistor symbol shows an arrow from the base into the emitter. This means that the current flows from collector terminal to emitter terminal.

Circuit diagram symbol of the 2N149 transistor as follows.

2N149 Transistor Specification

Transistor Code		2N149
Transistor Type		BJT
Transistor Polarity		NPN
Transistor Material		Germanium(GE)
Package		TO22
Collector Power Dissipation (Maximum)	PC	0.065W
Collector-Base Voltage (Maximum)	VCB	16V
Collector Current (Maximum)	IC	0.005A
Operating Junction Temperature (Maximum)	TJ	75°C
Forward Current Transfer Ratio (hFE Value)		50
Transition Frequency	FT	0.5MHz
Collector Capacitance	CC	2pF

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